多域軟件定義光網(wǎng)絡(luò)中多參數(shù)約束的路由和頻譜分配算法研究
[Abstract]:Cloud computing, big data, data center and other new data services put forward more requirements for network services: low latency, higher availability and end-to-end service scheduling to ensure quality of service. Its explosive growth trend brings a powerful driving force to the intelligent development of optical networks. Because traditional wavelength division multiplexing (WDM) optical networks divide channels in wavelength units, bandwidth resource utilization is extremely low. In order to carry data service more effectively and flexibly, flexible optical network is proposed and further developed. From SDH (Synchronous Digital Hierarchy, synchronous digital system (SDH (Synchronous Digital Hierarchy,) optical network to traditional WDM optical network to flexible optical network, the whole process is to meet the needs of large capacity, high efficiency and multi-granularity transmission of data services. With the continuous expansion of optical network scale, the multi-domain network, which is divided into many subnets, needs to respond positively to the controllable, manageable and multi-service differentiated carrying capacity of the user, service and network in the data service. The new network architecture of software defined network (Software Defined Network,SDN) can achieve flexible, efficient, intelligent scheduling and adjustment. The introduction of optical network to form software defined optical network can provide open, flexible and controllable functions. Physical layer damage is a major factor affecting the signal transmission quality of optical networks. In addition, in order to respond positively to the call to build a green network, energy-saving issues are also increasingly concerned. Based on the multi-domain software defined optical network (Software Defined Optical Network,SDON), this paper studies the multi-parameter constrained routing and spectrum allocation (Routing and Spectrum Assignment,RSA) algorithms, such as damage, energy consumption, quality of service differentiation, etc. The aim is to improve network performance from multiple angles. This paper has the following research achievements: (1) study the traffic transmission requirements in the multi-domain network environment, consider the physical damage, energy consumption and other parameters, The hierarchical control architecture of the optical network defined by multi-domain software, which can dynamically and flexibly monitor the transmission performance of the underlying transmission equipment and links, is improved. The corresponding information perception module is added to the control plane to obtain the basic information of the infrastructure layer. (2) the constraints of the multi-network parameters are taken as the breakthrough point in the multi-domain software definition optical network. Based on the improved hierarchical control architecture, a multi-parameter constrained RSA algorithm based on subtopological graph is proposed. The algorithm can effectively avoid many kinds of physical damage and achieve the goal of energy saving. In addition, the algorithm can also realize the distinction of quality of service and allocate different routing resources to different classes of services. The performance of the network can be improved on the whole. (3) the sub-topology graph is applied to the multi-domain heterogeneous software definition optical network, and the multi-parameter constraint condition is also considered, and the interoperation between the boundary nodes in the heterogeneous network domain is studied in detail. Thus, the RSA algorithm in multi-domain heterogeneous SDON is proposed. The simulation results show that the performance of the proposed algorithm in blocking rate and energy consumption is improved and the network optimization goal is achieved.
【學(xué)位授予單位】:河北工程大學(xué)
【學(xué)位級別】:碩士
【學(xué)位授予年份】:2017
【分類號】:TN929.1
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